[Intel-gfx] [PATCH 02/12] drm/i915/icl: Config utility pin for DSI

[Madhav Chauhan]

This patch configures utility pin for DSI command
mode operation as per BSPEC DSI trancoder enable
sequence.

Signed-off-by: Madhav Chauhan <madhav.chauhan at intel.com>
---
 drivers/gpu/drm/i915/icl_dsi.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/gpu/drm/i915/icl_dsi.c b/drivers/gpu/drm/i915/icl_dsi.c
index 19a3815..a175349 100644
--- a/drivers/gpu/drm/i915/icl_dsi.c
+++ b/drivers/gpu/drm/i915/icl_dsi.c
@@ -874,6 +874,21 @@ static void gen11_dsi_setup_timeouts(struct intel_encoder *encoder)
 	}
 }
 
+static void gen11_dsi_config_utility_pin(struct intel_encoder *encoder)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base);
+	u32 tmp;
+
+	if (intel_dsi->operation_mode != INTEL_DSI_COMMAND_MODE)
+		return;
+
+	tmp = I915_READ(UTIL_PIN_CTL);
+	tmp |= ICL_UTIL_PIN_DIRECTION;
+	tmp |= UTIL_PIN_ENABLE;
+	I915_WRITE(UTIL_PIN_CTL, tmp);
+}
+
 static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
 				const struct intel_crtc_state *pipe_config)
 {
@@ -892,6 +907,9 @@ static void gen11_dsi_enable_port_and_phy(struct intel_encoder *encoder,
 	/* step 4e: setup D-PHY timings */
 	gen11_dsi_setup_dphy_timings(encoder);
 
+	/* step 4f: config utility pin */
+	gen11_dsi_config_utility_pin(encoder);
+
 	/* step 4g: setup DSI protocol timeouts */
 	gen11_dsi_setup_timeouts(encoder);
 
-- 
2.7.4